LED street lamp

Abstract

The present invention relates to a LED street lamp, and more particularly to LED street lamp which is easy to maintenance. The LED street lamp comprises street lamp pole, lamp body and LED bulbs, said lamp body is mounted on the top of said street lamp pole, said LED bulbs is mounted in said lamp body, wherein the LED street lamp further comprises Power supply adapter and constant current actuating device, said Power supply adapter is mounted at the bottom of said street lamp pole, said constant current actuating device is mounted in said lamp body. The LED street lamp involved in the present invention is easy to maintenance.

1. An LED street lamp, comprising a street lamp pole, a lamp body and LED bulbs, said lamp body being mounted on the top of said street lamp pole, said LED bulbs being mounted in said lamp body, wherein the LED street lamp further comprises a power supply adapter having a first output end and a first input end, and a constant current actuating device having a second output end and a second input end, and wherein the LED street lamp further comprises an over heat thermostat mounted in said lamp body, and said over heat thermostat is mounted between the first output end of said power supply adapter and the second input end of said constant current actuating device, characterized in that,
 the lamp body comprises a head portion, a middle portion and a tail portion; said head portion and one side of said middle portion are connected butt and butt, and the opposite side of said middle portion and said tail portion are connected in the same way; a first packing washer is provided between the head portion and the middle portion, and the head portion and the middle portion are secured by fasteners; a second packing washer is provided between the tail portion and the middle portion, and the tail portion and the middle portion are secured by another fasteners; 
 the middle portion is a profile having a same cross section in different positions along its length direction; said profile consists of a basal plate and said basal plate is tabulated and extends along the length of said profile; said basal plate has a back side and a front side; two side plates are each mounted on each of two edges of said front side, and there are a plurality of heat dissipation wings mounted on said back side; 
 the LED bulbs are mounted on a side of heat conducting bottom-board, which forms a LED array board, and a printed circuit is mounted on said heat conducting bottom-board; the other side of said heat conducting bottom-board which has no LED bulb is dinged to said front side of said basal plate of middle portion of said lamp body; 
 the LED street lamp further comprises a secondary optical lens; said secondary optical lens is mounted on a lens bottom-board; said lens bottom-board is parallel to the LED array board; each said LED bulb is corresponding to one said secondary optical lens; there are support units having the same height mounted on the side of said lens bottom-board facing to the LED array board; said heat conducting bottom-board is supported by said support units; said lens bottom-board and said heat conducting bottom-board are connected to the front side of said basal plate with fastener; 
 a first cross member is mounted on said head portion at the end connecting with said middle portion; a second cross member is mounted on the tail portion at the end connecting with said middle portion; said first cross member, second cross member, said side plate, and the front side of said middle portion together define a chamber; the front side of said middle portion form the bottom of said chamber; said first cross member, second cross member, and said two side plates form walls of said chamber: a step used for placing a lamp-chimney is mounted on the other end of the walls of the chamber which is opposite to the bottom; a tube is mounted on said head portion; the axis of said tube is vertical to said first cross member; a outlet hole leading into said tube is mounted on said first cross member; a threaded hole running through the tube wall is mounted on the side wall of said tube; 
 said head portion, middle portion and tail portion are all made of heat-conducting material; 
 said LED street lamp further comprises a lamp-chimney; said lamp-chimney is mounted on said step; a third packing washer is mounted between said lamp-chimney and the lamp body; the LED array board comprises a plurality of LED subsidiary array boards; a group of LED lamps are mounted on each LED subsidiary array board; each LED subsidiary array board is connected on the front side of said basal board of the middle portion with fastener; and 
 correspondingly, the lens bottom-board also comprises a plurality of subsidiary lens bottom-boards; a group of quadratic optical lenses are mounted on each subsidiary lens bottom-board; each subsidiary lens bottom-board is connected on the front side of said basal board of middle portion with fastener; said constant current actuating device is mounted on the middle portion closer to the head portion of the lamp body, and the heat-actuated device of the over heat thermostat is mounted on the heat conducting bottom-board.